IMPORTANT: This is intended to supplement, not replace, the judgment of your doctor or pharmacist. It should not be assumed that the drug is appropriate or effective for you. Consult your doctor before using this drug. OMEPRAZOLE (o-MEH-prah-zowl) BRAND NAME(S): Prilosec, Losec, Zegerid USES: Used to treat gastroesophageal reflux disease (GERD) and other conditions caused by excess stomach acid. Also used to heal erosive esophagitis. HOW TO USE: Take this drug before eating. Follow all directions on the label. Do not take more than one tablet every 24 hours. SIDE EFFECTS: This drug may cause: hives, difficulty breathing, swelling, diarrhea, bloody stool, magnesium deficiency, muscle cramps and weakness. If other symptoms persist, notify your doctor. PRECAUTIONS: Tell your doctor if you have: liver disease, kidney disease, or if your body is low on magnesium.